Q. No.In angiosperms, the mature female gametophyte is represented by:
1.
Nucellus
2.
Megaspore
3.
MMC
4.
Embryosac
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A typical angiosperm embryosac, at maturity, is:
| 1. | 8 celled and 8 nucleate | 2. | 8 celled and 7 nucleate |
| 3. | 7 celled and 8 nucleate | 4. | 7 celled and 7 nucleate |
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Chasmocleistogamy [Amphicarpy] is not seen in:
| 1. | Viola [Common pansy] | 2. | Oxalis |
| 3. | Pisum sativum | 4. | Commelina |
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The dominating pollinating agent of flowering plants amongst animals are:
| 1. | Arboreal mammals | 2. | Insects |
| 3. | Birds | 4. | Reptiles |
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Which of the following is not used by flowering plants as an outbreeding device?
| 1. | Lack of synchronization between pollen release and stigma receptivity. |
| 2. | Anther and Stigma placed at different levels. |
| 3. | Self-incompatibility. |
| 4. | Production of bisexual flowers. |
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The pollen tube releases the two male gametes first into:
1. The vicinity of the egg cell.
2. The vicinity of polar nuclei.
3. In the cytoplasm of synergids.
4. In the cytoplasm of antipodals.
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A typical angiosperm anther is:
1. Bilobed and polythecous
2. Unilobed and monothecous
3. Multilobed and monothecous
4. Bilobed and dithecous
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What is true about the vegetative cell in the pollen tube?
| 1. | It is smaller than the generative cell |
| 2. | It has an irregular shaped nucleus |
| 3. | It floats in the cytoplasm of the generative cell |
| 4. | It has a dense cytoplasm lacking food reserves |
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In a multicarpellary syncarpous ovary:
| 1. | There is more than one pistil that is fused with the other |
| 2. | There is more than one pistil that is free from each other |
| 3. | There is one pistil that is fused with the stamen |
| 4. | There is more than one pistil that is fused with the stamen |
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When the embryosac develops from a single functional megaspore [the other three get generate], it is called as:
| 1. | Monosporic | 2. | Bisporic |
| 3. | Trisporic | 4. | Tetrasporic |
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